![]() Historically, they appeared in the App Store app, in your list of purchased items, but the only operating systems still showing up there for me are the developer beta of Sierra and the GM candidate for El Capitan (and I doubt they’d work anyway). If you want to rebuild your archive, you can download new installers from links on these pages:Īpple says that earlier versions are not available for download, and as far as I can tell, that’s true. The Finder may report that those installers can’t be verified and may have been corrupted or tampered with during download.Īpple has now re-signed and re-released older installers, giving them a new expiration date of 14 April 2029-nearly 10 years in the future. The people who are being impacted are Apple consultants and IT admins who have built troubleshooting toolkits that contain a selection of macOS installers for rebuilding Macs with whatever version of macOS is required. That has happened again, since many, if not all of Apple’s recent installers had an expiration date of 24 October 2019, which came and went last week.įor most Mac users, this kerfuffle is largely irrelevant-if you need an installer for an older version of macOS, you’ll get one that will work when you download it. On his Der Flounder blog, Rich Trouton explains what happens when these certificates expire-Apple reissues the installers with new certificates. ![]() That’s sensible, but there’s a gotcha: the certificates Apple uses to sign these installers have expiration dates. Redownload Archived macOS Installers to Address Expired CertificatesĪpple digitally signs the installers used by its software updates to ensure that they haven’t been tampered with. #1683: New M3 chips in updated MacBook Pros and iMac, record Apple Q4 profits on lower revenues, no more 27-inch iMacs.#1684: OS bug fix releases, Finder tag poll results, Messages identity verification, blocking spambots, which Apple services do you use?.#1685: Hidden secrets of the Fn key, Emergency SOS via satellite free access extended, RCS support in Messages, Rogue Amoeba icon evolution.#1686: Please support TidBITS, OS security updates, Apple services poll results, biking with an iPhone.#1687: Feature-rich OS updates, recovering from a crashing bug in Contacts, Zoom for Apple TV, how much do you use widgets?.Now your older OS installer thumb drives will work! Just remember to re-set the Date back to the correct year and set it back to auto. The trick is back dating the systems clock! Alter the Date & Time setting from auto set to manual and then alter the date to a year that is within the given OS’s release window. Not to fear! You can still install the OS. Some Internet recovery images likewise have not been updated. In all of these just jump down to Step 4 to get to the URL link for the OS image.Īpple did not alter the older images in their downloads. The issue you face with the newer macOS’s is Apple didn’t update the certificate which is why this has become more of an issue as of late. As an example I had to re-install Lion for someone as they just didn’t want anything newer (90 year old lady) who just didn’t want to relearn how to do things or have the will to update her apps. You’re hitting an expired certificate issue! Here’s more on it If you've got an old macOS install image, it will probably stop working todayĪpple has been doing this for years! You mostly on hit this issue on systems which can’t support newer OS’s.
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